/*
 * Sonatype Nexus (TM) Open Source Version
 * Copyright (c) 2008-present Sonatype, Inc.
 * All rights reserved. Includes the third-party code listed at http://links.sonatype.com/products/nexus/oss/attributions.
 *
 * This program and the accompanying materials are made available under the terms of the Eclipse Public License Version 1.0,
 * which accompanies this distribution and is available at http://www.eclipse.org/legal/epl-v10.html.
 *
 * Sonatype Nexus (TM) Professional Version is available from Sonatype, Inc. "Sonatype" and "Sonatype Nexus" are trademarks
 * of Sonatype, Inc. Apache Maven is a trademark of the Apache Software Foundation. M2eclipse is a trademark of the
 * Eclipse Foundation. All other trademarks are the property of their respective owners.
 */
package org.sonatype.nexus.repository.view.handlers;

import javax.annotation.Nonnull;
import javax.inject.Inject;
import javax.inject.Named;
import javax.inject.Singleton;

import org.sonatype.nexus.repository.HighAvailabilitySupportChecker;
import org.sonatype.nexus.repository.view.Context;
import org.sonatype.nexus.repository.view.Handler;
import org.sonatype.nexus.repository.view.Response;

import static java.lang.String.format;
import static org.sonatype.nexus.repository.http.HttpResponses.badRequest;

/**
 * Returns the message for client in case format doesn't support High Availability infrastructure.
 *
 * @since 3.17
 */
@Named
@Singleton
public class FormatHighAvailabilitySupportHandler
    implements Handler
{
  private HighAvailabilitySupportChecker highAvailabilitySupportChecker;

  @Inject
  public FormatHighAvailabilitySupportHandler(final HighAvailabilitySupportChecker highAvailabilitySupportChecker) {
    this.highAvailabilitySupportChecker = highAvailabilitySupportChecker;
  }

  @Nonnull
  @Override
  public Response handle(@Nonnull final Context context) throws Exception {
    String format = context.getRepository().getFormat().getValue();
    if (!highAvailabilitySupportChecker.isSupported(format)) {
      return badRequest(format("%s is not supported in clustered mode.", format));
    }

    return context.proceed();
  }
}
